JP2017071423A - Free-standing film-made container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a film-made container which enables a steam escaping part to be stably positioned at an upper part during heating, forms an opening part passing through an area below the steam escaping part during opening, and inhibits the stream escaping part from being an obstacle when a content is taken out.SOLUTION: A bag-like free-standing film-made container (1) comprises at least a front surface film (2), a back surface film (3), and a bottom surface film (4) folded on a bottom surface. The front surface film and the back surface film have periphery seal parts at peripheries of at least a left surface and a right surface, and the folded bottom surface film is fused to bottom surface sides fo the front surface film and the rear surface film. The bottom surface inclines relative to the upper surface, and a steam escaping part (5), in which an unsealed part at a seal outer side extends to a container inner part, is provided at an inclined side upper side of the periphery seal part. An opening part is provided below the steam escaping part so as to be arranged parallel to the bottom surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a container made of a film, which has a folded portion on a bottom surface, opens an upper portion, and easily takes out contents.

A self-supporting container made of a film that is self-supporting like a blow bottle and uses a small amount of resin is developed by folding the intermediate film on the bottom side or side surface, and by incorporating a simple mechanism. It can be produced by a bag making machine.
In particular, a self-supporting container with a folding part on the lower side is highly self-supporting and easy to manufacture, and the contents can be folded compactly before storage. It's being used.
These are used not only as refill containers for toiletries such as shampoos, rinses and liquid detergents, but also as primary containers such as soy sauce.

By the way, in recent years, it has been proposed to use a film container as a retort pouch and heat-treat with a hot water bath or a microwave oven.
Such a film container is heated in a state where food is stored inside the container, and after heating, a method of transferring to another container has been adopted.
When this film-made container is used for a retort pouch, the heated film-made container becomes extremely high temperature and pressure, and gas such as water vapor is generated from the inside.
When the gas such as water vapor becomes high temperature, the container is inflated. If the gas is inflated as it is, the film container may be ruptured and the high temperature contents may be scattered.
For this reason, when steam or the like becomes high pressure, a mechanism is adopted in which the gas generated outside the container is released by steam removal and the atmospheric pressure is lowered.

As a countermeasure against the problem that the inside of the film container becomes high pressure and high temperature in such a retort, for example, in Patent Document 1,
A part of both side seal lines forming the bag body is bent inward to form a V shape, and a triangular unsealed surface is formed in a valley portion of the V-shaped seal portion, and the unsealed surface is a side seal. A self-supporting bag for microwave ovens has been proposed, characterized in that it protrudes from the sealing surface of the wire to the inside of the bag body.

In this self-supporting bag for microwave oven, it is necessary to always provide a higher position of the steam vent than the interface of the contents so that the steam vent composed of the V-shaped seal part can extract only the steam and lower the atmospheric pressure. .
And, in order to form a V-shaped upper seal that protrudes inwardly on both side seal lines, to open after overheating, the lower side must be opened, so the area to be stored becomes narrow There were also problems such as.

Japanese Utility Model Publication No.4-10079

  Therefore, a film container in which the steam vent is stably located at the top during heating, and an unsealed part that passes below the steam vent when opening is formed so that the steam vent does not get in the way when taking out the contents. It is an object of the present invention to obtain

The present invention comprises at least a front film, a back film, and a bottom film folded into the bottom surface,
The front film and the back film have a peripheral seal part at the periphery of at least the left side surface and the right side surface,
In the bag-like self-supporting film container in which the folded bottom film is fused to the bottom side of the front film and the back film,
Inclining the bottom to the top,
In addition, a steam vent part where the unsealed part outside the seal extends inside the container is provided above the inclined side of the peripheral seal part,
The self-supporting film container is characterized in that an opening is provided in parallel to the bottom surface and below the steam vent.

When the self-supporting film container of the present invention is heated in a microwave oven or the like, the vapor venting portion is stably positioned above the content interface, and the vapor venting portion does not interfere with the content removal. Can be opened.
In addition, it is a self-supporting film container that has a shape that allows the contents to be easily eaten without being transferred to another container as it is after being heated and opened, and is very easy to handle.

In the 1st Example of the self-supporting film container of this invention, it is the perspective view which shows the external appearance at the time of the filling, and the front view of a self-supporting film container. In 2nd Example of the self-supporting film container of this invention, it is a perspective view which shows the external appearance at the time of the filling, and a front view of a self-supporting film container. In the 3rd Example of the self-supporting film container of this invention, it is a perspective view which shows the external appearance at the time of the filling, and a front view of a self-supporting film container. It is sectional drawing which shows the state under heating with the microwave oven in 1st Example of the self-supporting film container of this invention. It is a perspective view which shows the state which can open the opening part and can take out the content after heating with the microwave oven in 1st Example of the self-supporting film container of this invention.

Hereinafter, the example of embodiment of the self-supporting film container of this invention is described in detail using figures.
FIG. 1 is a first embodiment of a self-supporting film container 1 according to the present invention, FIG. 1-1 is a perspective view showing the appearance of a container filled with contents, and FIG. 1-2 is a front view of the self-supporting film container 1. is there.

In the first embodiment, the front film 2 and the back film 3 are composed of a single film folded on the upper surface 7.
The front film 2 and the back film 3 are provided with a peripheral seal portion with the peripheral edges of the left side surface and the right side surface being a left side seal portion 11 and a right side seal portion 12.
The bottom film 4 is folded with the fusion surface facing outward, and is inserted so as to be sandwiched between the front film 2 and the back film 3, and is fused to the bottom side thereof. The bottom rear surface fusion part 42 is fused. The bottom film 4 folded in this way can have the folds widened to form the bottom surface 40.
The bottom surface 40 is installed in a state of being inclined to the right side in the drawing with respect to the upper surface 7, and the steam vent 5 is formed above the right side seal portion 12 on the inclined right peripheral edge.
In the steam vent 5, an unsealed portion 51 outside the seal extends inside the container with respect to the periphery. The unsealed portion 51 may be left unsealed and the front film 2 and the back film 3 may be left as they are, but may be cut according to the shape as shown in the figure.
Furthermore, the opening 6 connecting the left opening start point 61 and the right opening start point 62 is provided in parallel to the bottom surface 40 and below the vapor vent 5.

In the first embodiment, in the bottom film 4 folded on the bottom surface, a bottom film fold line 43 is provided in parallel to the top surface, and the bottom surface 40 has an elongated shape on the left side.
And in the state which stood the container, it will be in the state inclined to the left.

The left opening start point 61 and the right opening start point 62 are described as notches in this embodiment, but may be opening start points such as cuts, half cuts, perforations, and the like.
The opening 6 between the left opening start point 61 and the right opening start point 62 may be a half cut, a half cut perforation, or an opening 6 weakened by laser processing.

In the vicinity of the lower side where the bottom seal and the side seal intersect, a bottom seal portion where the front film 2 and the back film 3 are fused is provided by partially opening or notching the bottom film 4.
Although not necessarily indispensable, when the bottom side seal portion 13 is provided, the bottom surface is firm and the container can be stood stably.

FIG. 2 is a second embodiment of the self-supporting film container of the present invention, FIG. 2-1 is a perspective view showing the appearance of the container filled with the contents, and FIG. 2-2 is a front view of the self-supporting film container.
The second embodiment is different from the first embodiment in that the front film 2 and the back film 3 are not a single film and the bottom shape.
In the bottom film 4 folded on the bottom surface, a fold line 43 of the bottom film is inclined with respect to the top surface and provided in parallel with the bottom seal, and the bottom surface 40 has a symmetrical shape. However, since the bottom surface itself is inclined, when the container is erected, the bottom surface is inclined to the left.
In terms of productivity, a loss occurs compared to the first embodiment, but since the bottom surface can take a solid area, it is highly self-supporting.

FIG. 3 shows a third embodiment of the self-supporting film container according to the present invention. FIG. 3-1 is a perspective view showing the appearance of the container filled with the contents, and FIG. 3-2 is a front view of the self-supporting film container.
The third embodiment is different from the first embodiment in that the front film 2 and the back film 3 are not a single film and that the vapor vent 5 is provided on the upper surface 7.
The vapor vent 5 is provided on the inclined side where the bottom 40 is inclined, although it is the upper surface. Therefore, when the container is erected, the vapor vent 5 is sufficiently disposed on the upper side, so that the liquid content is not scattered and the vapor can be extracted.

FIG. 4 is a first embodiment of the self-supporting film container of the present invention, and is a cross-sectional view showing the contents being heated. Steam 81 is generated from the heated contents 8, and the self-supporting film container has a high pressure inside and swells greatly.
The internal pressure of the self-supporting film container rises, the container swells, and the force that peels off the fusion part protruding inside the container concentrates, so that the inside of the vapor vent part 5 begins to peel off.
When the tip of the peeling part 52 that has started to peel off from the vapor venting part 5 reaches the unsealed part 51 outside the seal extended inside the container, the water vapor 81 leaks to the outside and remains at a constant pressure, and the pressure is maintained. Is done.
Since the vapor vent part 5 is above the opening part, the liquid of the contents is not ejected and scattered.

FIG. 5 is a first embodiment of the self-supporting film container of the present invention, and is a perspective view showing a state in which the opening 6 of the heated self-supporting film container is opened and the heated contents can be taken out. The upper side is FIG. 5-1, and the lower side with the contents is FIG.
When opening, the opening 6 is opened by tearing from the left opening start point 61 or the right opening start point 62 provided on the left and right of the opening 6.
Although the container is inclined, the bottom surface is widened so that it can stand on its own. When the opening 6 is cut, the opened steam vent 5 is located above the opening 6 so that the content does not leak.
When opened, it is easy to hold if the peripheral seal portion has a large area near the inclined side end portion or the bottom side seal portion 13 in the vicinity.

The front film 2 and the back film 3 used in the self-supporting film container of the present invention may have a configuration such as stretched polyethylene terephthalate / polyethylene / barrier film / sealant from the outside.
For example, biaxially stretched polyethylene terephthalate / polyethylene,
Biaxially stretched polyamide / polyethylene / inorganic oxide vapor-deposited polyethylene terephthalate / polyethylene,
Biaxially stretched polyethylene terephthalate / polyethylene / ethylene vinyl acetate copolymer saponified product / polyethylene,
Biaxially stretched polyethylene terephthalate / polyethylene / adhesive resin / polyamide / adhesive resin / polyethylene,
Biaxially oriented polypropylene / polyamide / adhesive resin // polyethylene,
A general configuration such as
As the barrier film, use is made of stretched polyethylene terephthalate or stretched polyamide film deposited with metal oxide such as silicon oxide or aluminum oxide, or saponified ethylene vinyl acetate copolymer, but deposited with pure metal such as aluminum. Do not use metal foil or metal foil because it generates heat in the microwave.
The polyamide film is used because it is difficult to break, has high impact resistance, and has high flexibility.
As the sealant, linear low density polyethylene having a high fusion strength and heat resistance is preferable.
These films can be produced by pasting them together with an ordinary dry lamination machine, an extruder laminating machine, or the like.

The film used for the bottom film may be a front film or a back film. However, since it is used by being folded, it is preferable to make the biaxially stretched film of the surface layer thin in order to make it softer than the front film 2 and the back film 3.
In particular, a biaxially stretched film is used for the surface layer so that the surface layers are not fused together.

  The self-supporting film container of the present invention is as described above, and is used for a container that is heated and used in a hot water bath or a microwave oven. Even when the film container is open, the film container is highly self-supporting and can securely hold the vapor vent at a high position, so there is no problem that the contents of the container are scattered. In addition, since it is self-supporting even after opening, the contents of the present invention can be eaten without being changed as it is, and the merit of the present invention is great because it is very easy to handle.

1... Self-supporting film container 11... Left side seal portion 12... Right side seal portion 13. Side seal part 2 ... Front film 3 ... Back film 4 ... Bottom film 40 ... Bottom 41 ... Bottom front fusion part 42 ... Bottom rear fusion part 43 ... Folding line 5 ... Steam removal Part 51 ... Unsealed part 52 ... Peeling part 6 ... Opening 61 ... Left opening start point 62・ ・ ・ ・ ・ ・ ・ ・ Right opening start point 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Top surface 8 ・ ・ ・ ・ ・ ・ ・ ・ Content 81 ・ ・ ・ ・ ・ ・ ・ ・ Water vapor

Claims (5)

The front film is composed of at least a front film, a back film, and a bottom film that is folded into the bottom surface. The front film and the back film have a peripheral seal portion at least at the periphery of the left side surface and the right side surface. In a bag-like self-supporting film container fused to the bottom side of the back film,
The bottom surface is inclined with respect to the top surface, and a steam vent part where the unsealed part outside the seal extends inside the container is provided above the inclined side of the peripheral seal part, parallel to the bottom surface and below the steam vent part. A self-supporting film container characterized in that an opening is provided in the container.   The self-supporting film container according to claim 1, wherein the folding of the bottom film is parallel to the top surface.   The self-supporting film container according to claim 1 or 2, further comprising a tear starting point on the left, right, or left and right side surfaces of the opening.   The self-supporting film container according to any one of claims 1 to 3, wherein the steam vent is provided above the inclined side surface of the bottom surface.   The self-supporting film container according to any one of claims 1 to 3, wherein the vapor venting portion is provided on the upper surface and closer to the side surface on which the bottom surface is inclined.

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